#define _CRT_SECURE_NO_WARNINGS 1
#include"Date.h"
Date:: Date(int year, int month , int day )
{
	 _year=year;
	 _month=month;
	 _day=day;
}
void Date::print()const 
{
	cout << _year << "/" << _month << "/" << _day << endl;
}
Date& Date::operator+=(int day)
{
	_day += day;
	while (_day > Getmonthday(_year, _month))
	{
		_day -=Getmonthday(_year, _month);
		_month++;
		if (_month > 13)
		{
			_year++;
			_month = 1;
		}
	}
	return *this;
}
Date Date::operator+=(int day)const
{
	Date tmp = *this;
	tmp += day;
	return tmp;
}
Date& Date::operator-=(int day)
{
	while (day > _day)
	{
		day -= _day;
		_day = Getmonthday(_year, _month);
		_month--;
		if (_month == 0)
		{
			_month = 12;
			_year--;
		}
	}
	_day -= day;
	return *this;
}
Date Date::operator-=(int day)const
{
	Date tmp = *this;
	tmp -= day;
	return tmp;
}
Date& Date::operator++()
{
	*this+= 1;
	return *this;
}
Date Date::operator++(int)
{
	Date tmp = *this;
	*this += 1;
	return tmp;
}
Date& Date::operator--()
{
	*this -= 1;
	return *this;
}
Date Date::operator--(int)
{
	Date tmp = *this;
	*this -= 1;
	return tmp;
}
bool Date::operator<(const Date& d)const
{
	if (_year < d._year)
	{
		return true;
	}
	else if(_year==d._year)
	{
		if (_month < d._month)
		{
			return true;
		}
		else if (_month == d._month)
		{
			if (_day < d._day)
			{
				return true;
			}
		}
	}
	return false;
}
bool Date:: operator==(const Date& d)const
{
	return _year == d._year && _month == d._month && _day == d._day;
}
bool Date::operator<=(const Date& d)const
{
	return *this < d || *this == d;
}
bool Date::operator>(const Date& d)const
{
	if (_year > d._year)
	{
		return true;
	}
	else if (_year == d._year)
	{
		if (_month > d._month)
		{
			return true;
		}
		else if (_month == d._month)
		{
			if (_day > d._day)
			{
				return true;
			}
		}
	}
	return false;
}
bool Date::operator>=(const Date& d)const
{
	return *this > d || *this == d;
}
bool Date:: operator!=(const Date& d)const
{
	return !(*this == d);
}
bool Date::ChekDate()
{
	if (_month < 1 || _month>12 || _day<1 || _day>Getmonthday(_year, _month))
	{
		return false;
	}
	else
		return true;
}
